Yarn-package.



s. W. WARDWELL.

YARN PACKAGE.

IIIIIIIIIIIII LED MAY 12, 1908. v

- Patented July 18, 1911.

WWMM ATTO/f/VEVS UNITED STATES PATENT OFFICE.

SIMON W. WARDWELL, OF PROVIDENCE,'

RHODE ISLAND, ASSIGNOR TO SUPREME KNITTING BOBBIN COMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE.

YARN-PACKAGE.

Specification of Letters Patent.

Patented July 18, 1911.

Application filed May 12, 1908. Serial No. 432,450.

To all whom it may concern:

Be it known that I, SIMON W. VVARDWELL, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Yarn-Packages, of which the following is a specification.

My invention is an improvement in yarn packages for supplying knitting machines and its purpose is to produce a package so built as to contain a greater quantity of material and deliver its contents more freely than bobbins usually employed for a like purpose. This I accomplish by a novel system of winding which is fully illustrated in the accompanying drawing.

The winding is accomplished on machines of that class in which the yarn depositing guide follows and bears against the wind ing surface or surface of deposit. By my novel system, a solid mass of yarn is built up, self sustained without any retaining head or .supporting base, the resultant package having a relatively fiat heel or bottom, a cylindrical body and a tapered delivery end or nose. The winding is accomplished through the thread-guide 2 of the winding machine which is traversed always in contact with the surface on which the yarn is deposited at the point of deposit, and the composition and form of the package is attained by first building up a substantially frusto conical base of yarn by gradually increasing the length of traverse of the guide, beginning with a relatively short traverse so that each layer of yarn is overlapped by the succeeding layers. This action continues until the full or normal length of traverse and outside diameter of the package are attained, after which the package is increased in volume by longitudinal extension with constant outside diameter, the length of guide traverse remaining constant but the path of traverse being progressively advanced along the bobbin or tube on which the winding is done until the package is completed.

The essential novelty of my invention consists in building the conical base, composed of yarn, with the angle of inclination of the path of travel of the thread-guide to the axis of the package constant, but its length variable. In other words, the first short layer initially deposited on the tube or bobbin is deposited at exactly the same angle or with the same degree of taper as the last layer wound in completing the package. The length of traverse increases gradually from the first, initial layer, until that predetermined length of layer is attained which corresponds with the ultimate diameter of the package wound. Thereafter, the length of traverse remains constant, developing a cylindrical body for the package as described. This winding at a constant angle is obtained by means of what I please to term a form 3 on the bobbin which carries the yarn mass. This form has a length of face and degree of taper corresponding to the initial length of traverse of the guide and the inclination of the latters path of travel to the axis of the package. The result secured by this expeclient is distinctly novel for the reasons already indicated. It has been determined that a package so wound possesses the following substantial advantages over other packages for like purposes. The package is substantially solid yarn, for the form 3 is of inconsiderable size, its diameter being less than the diameter of the yarn mass at its base or in its cylindrical body. Because the winding is started on the form or starter 8 which presents a substantial foundation corresponding to the direction of travel of the thread guide, and because the latter follows and bears against the surface of the yarn mass, positively controlling the yarn and accurately depositing it in a predetermined manner, the nose or delivery surface 4 may be less acute than usual. This is indicated in the drawing where the dot-and-dash lines show the taper usually secured on bobbins of this character. The greater volume of yarn indicated obviously far outweighs the inconsiderable space occupied by the form 3.

Because the nose A is flatter than on the packages usually employed, the yarn is delivered to the knitting with unusual freedom. In delivering, the yarn is lifted ofi from the nose 4, rather than dragged over it thus further easing the delivery. More important still is the elimination of softness at the core, immediately adjacent the bobbin. As the guide 2 bears at all times directly and with pressure against the surface of deposit at the winding point, from the outermost portion clear down to the tube, there is never any free yarn between the guide and the surface of deposit. Therefore the yarn is wound solidly and can be built upon with maximum tension. This is vital in winding with maximum density, which can only be attained when the core or interior mass is wound compactly and with precision. In windings where the yarn is not definitely controlled clear to the tube or bobbin, softness sometimes occurs. The constrictive action of the outer windings, especially where much tension is employed, causes the soft. portion to flow, as it were. Inasmuch as there is but one unrestricted direction for movement, viz: under and ahead of the guide, this soft portion is forced in that direction, into the path of the guide, obstructing it and disturbing its action. This is particularly true of packages of so large diameter as knitting supply bob bins, because the constrictive effect increases with the diameter. These soft places cannot be obliterated by continued windin but they rather increase *ith cumulative ill effect. By obstructing the guide, they cause distortion of the package. Of themselves, the n'otrusions of soft yarn impede the delivery of the yarn, and sometimes even cause portions to slough off, instead of delivering properly. All of these ill effects are overcome however by winding as described in thin layers of constant inclination to the axis of the bobbin, so that the guide controls the yarn clear to the tube or bobbin.

The form 3 must not be confounded with a bobbin head or base as ordinarily considered, which consideration contemplates only a retainin or a supporting function. The mode of winding described, with the guide 2 in close contact at all times with the surface of deposit or windin provides all the retention and support needed. The function of the form 3 is purely initiative, insuring that the first layer wound shall be of the same character and direction as the last, even though shorter, and without encroaching on the yarn containing capacity of the package.

I do not here claim the novel form of bobbin employed, as that is subject of an other application, Serial No. 432,4t l9, filed May 12, 1908 but,

\Vithout limiting myself to the nature of the material wound or the purpose for which it is employed, lt claim:

1. In a yarn package the combination with a tube having a frusto-conieal form 3 at its base which is substantially less in eX- treme diameter than the outside diameter of the yarn mass of the package, of a yarn mass wound on said tube in superposed conical layers of constant taper having the same inclination as that of the frusto-conical form 3, with the first layer of winding corresponding in length to that of the face of said form. 3, and succeeding layers progressively longer until a length of layer is reached which corresponds with the diameter of the package, and all layers thereafter of constant length.

2. In a yarn supply for knitting machines, the combination with a tube having a form 23, substantially less in extreme diameter than the extreme diameter of the yarn mass of the supply and of a taper corresponding to the inclination of path of travel of the thread guide 2, and a yarn mass wound on said tube in superposed conical layers of constant taper, the first layer corresponding in length to that of the face of the said form 3, and succeeding layers progressively longer until that length of layer is secured which corresponds with the diameter of the package, and all layers thereafter of constant length to the completion of the package.

In testimony whereof I affix my signature in presence of two witnesses.

SIMON lV: TVARDVi ELL.

Witnesses ARTHUR I. HARVEY, EDWIN C. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

